You have to put them somewhere..... I must admit when my neighbours put their shed on the northern edge of my plot I breathed a sigh of relief and marked the area down for the polytunnel.......... I've got a path running down my southern border, anything they do on the other side of that affects 2 feet less of growing space than it might otherwise... or in fact 1 foot, the path straddles our border, we agreed that when I told them I had some slabs.... we both get to use a path easily wide enough to get a barrow down and oly lose 1 foot of space each..... we're not allowed fences on opur site....